SpaGuard Calcium Hardness Increaser 12 oz

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SpaGuard Calcium Hardness Increaser 12 oz

Low levels of calcium assist in spa surface and equipment deterioration, SpaGuard Calcium Hardness Increaser raises calcium levels to the recommended range of calcium in the water 200 - 1,000 ppm.  SpaGuard's Calcium Hardness Increaser enables spa owners to increase their calcium hardness with this easy to use granular formula, which will boost your calcium hardness to above the danger zone, where low levels cause extensive corrosion of plumbing, jets, fixtures, and tub surfaces. 


  • 1 tbs. per 100 gallons increases calcium hardness by 25 ppm
  • Prevents corrosion of equipment due to low calcium hardness
  • Prevents etching of plaster due to low calcium hardness

Measurement and Dosing:

Use all level measurements. 3 teaspoons=1 tablespoon, 2 cap-fulls= 1 tablespoon, 1/4 cup= 4 tablespoons, see chart below for proper dosing


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